Lamp focusing device



Jan. 7, 1930. BLACKMORE 1,742,683

LAMP FOCUSING DEVICE Filed March 4. 1927 Patented Jan. 7, 1930 UNITEDSTATES "PATEL-TNT OFFICE LLOYD BLACKMORE, OF DETROIT, MICHIGAN, ASSIGNOR TO GENERAL MOTORS COR- PORATION, OF DETROIT, MICHIGAN, ACORPORATION OF DELAWARE LAMP rocusnve DEVICE Application filed March 4,1927. Serial No. 172,585.

This invention relates to headlamps used on automotive vehicles andespecially to the adjustment of the lamp socket.

The bulb of the lamp is mounted in the com ventional socket which hassecured thereto a bracket with return bent ends. One of these endscatches into an opening in the reflecting surface immediately below thesocket and serves as a pivot for the lamp. The other 1 end encloses anut through which is passed a threaded rod having its end upset and itsopposite end extending without the lamp housing where it terminates inan operating handle. The ends of the return bends face each other andare surrounded by a coil spring which tends to urge the more distant endaway from the lamp reflector. By rotating the rod, the angle of inclineof the socket will be changed.

In the preferred form of the invention instead of using a bracket, Ipress a lug outwardly from the lamp socket and form this lug into a hookwhich engages in an opening in the lamp reflector. A nut, which may bethe terminal block of the socket, is rigidly secured in any suitable wayon the rear end of the socket and through this nut a rod is threaded theouter end of which extends through the lamp casing and terminates in anoperating handle. A coil spring surrounds the socket and tends to urgeit rearwardly.

The invention has resulted'ina considerable reduction in the number ofparts and brings about a much greater simplification of structure, andby the use of a single spring all parts are held firmly but resilientlyin ad justed position. The reduction in the number of parts makes a muchcheaper construction and considerably reduces the labor of assembly.

The invention is disclosed in the accompanying drawing in which Figure 1is a sectional view of an automobile headlamp with my invention appliedthereto.

Figure 2 is a detail view of a modification of Figure 1.

Figure 3 is an enlarged detail of a portion of the structure in Figure2.

Referring to the numbered parts of the drawing, 10 indicates a headlampcasing, 11 Q which lug engages in an opening 16 in the reflector at thebottom side of the socket 14.

, The rear end of the socket 141: has an opening 17 over which issecured in any suitable way a nut 18 through which extends a threadedrod 19 having an upset end 20. The rod 19 extends without the casing andterminates in an operating handle or knob 22 and by turning the knob 22it. is obvious that the rear end of the socket 14 will be raised orlowered due to the threaded contact of the nut 18 and rod 19. A washer28 is secured to the rod 19 inside the casing to properly hold it inposition. The socket will pivot at the point of engagement of the hook15 in the openingv 16 of the reflector.

A coil spring 21 surrounds the socket 14: and tends to urge itrearwardly.

Referring to Figure 2, it will be noted that instead of the lug 15,I'make use of a bracket 23 secured to the socket 14 and having its endsreturn bent as shown at 24: and 25. The end 24 engages in the opening 16in the lamp reflector to serve as a pivoting point while the oppositeend 25 is provided with an opening 26 through which is passed theoperating rod 19. Confined in the return bend of the end 25 is a nut 18and by turning the rod 19 the socket 14 will be angularly adjusted dueto thethreaded contact between the nut 18 and the rod 19. 7

Spring 27 extends between the return bent ends and tends to urge thesocket rearwardly.

I claim:

A headlamp comprising a casing, a reflector in the casing provided withan aperture, I

a lamp socket mounted in the aperture for tilting movement, said socketbeing provided with a bent over tongue engaging the reflector andlimiting the movement of the socket rearwardly of the reflector, anadjusting screw engaging the socket, a nut on one end of the screwadapted to be moved along the screw by rotation of the latter and toengage the socket to effect tilting thereof, the other end of theadjusting screw extending through the 3xterior of the housing, and aspring encircling the socket and reacting at one end against the rear ofthe reflector, and at the other end against said screw to hold the partsin adjusted position. V In testimony whereof I aflix my signature.

LLOYD BLAGKMORE.

